CAM Studio Gcode output - Z bottom level incorrect

We are having a hard time getting G-code output with the proper Z bottom level.

Link to CAD/CAM file:

https://oside.onshape.com/documents/f93410405d40a1163b451536/w/e9a1a2f43b4c637b5317217b/e/c8dbef55eccfb04fd4dac63a

We have made the Height parameters the same for the Operation #4 (Drill) as well as #6 (Rough) but the Gcode is not outputting the commanded bottom Z level.

Operation Line #4 Drill has a -.400, but Operation #6 Finish is -.100.

Here are a few screenshots of the setup. 

Gcode - Operation 4 vs 6 bottom level

Any suggestions would be great. I'm completely new to using Onshape CAM Studio and now sure what to try next to fix this issue.

Thanks,

Dave